Screen type flow evener



July 1 8 1933. :E. IE. BERRY SCREEN TYPE, FLOW EVENER Filed May 2, 1932 4 Sheets-Sheet l July 18,1933. E. E. BERRY SCREEN 'TYPE FLOW EVENER July' 18, 1933. E. E. BERRY SCREEN 'ITYPE FLOW EVENER Filed May 2, 1952 4 Sheets-Sheet 3 Ella:

III/II July 18, 1933. E. BERRY '1 1,918,514 v SCREENTYPE FLOW EVENER Fil ed May 2 "1932 I 4 Sheets-Sheet I 4 Patented July 18,1933 1 a h h p v i v UNITED S A ES; PATENT mm. a. mmmr, or nnnox'r, wrsconsm, meson T0 anon men wonn'sor anon, wxsocx'snv, a oonromnon or, Wisconsin scanner-ma now am J y Application and a, use." as nnocent.

This invention relates to paper making cplired for transfer of thestocktothe wire fl machines and more particularly to meansior t ey are completely disturbed th its screening and evenm the flowof the stock delivery to the head box, whereby most of the just rior to the app ication thereof to the work done the head box s d rected to web orming element. overcommg ectionable veloclty and diree 55 I It has heretofore been deemed necessary tional flowcharacteris i n d by 9 tofirst pass the stock through screens to dis-' transfer of thejstock from 1 3130 head perse the, fibers, separate out thesliversand box. J uncooked wood, and produce uniformity m In my copendlng apphcatlon Serial No.

' the stock, and then pass itinto a head box for 458,922, filed June 2, 1930, ent tled Method distribution to the wire or web'forming eleand means i for delivering "stock" for web me t f th hi formlngP, Ihave shown and described means The stock coming from the screens is in the 941 11 v replapetihe usual head boxhwhehres est condition'f rmakin a ood ualit of I-a Q 1 8 y in eroooperateswi ct er" gh per because th: fibers Eave just n his means lforievening theflow of to the persed and are uniformly distributed. It wire. The nvent1on of the present apphca-' 1s,'however, necessarytolconvert the flow of tron a ms to combine thefunctions of' the, the stock from the screens to a smooth flat screens, the flowevenelgandthe head box'and 2o stream that will flow out. evenly without th reby completely eliminate the head box as g. cross-currents or variations in;.veloc1ty, 0 aunit of the hi hp H the full width desired onthe web' form1ng A further object is the provision ofa de-, element This Presents a y q l s vice of'suchs'tructure that thestockemergespecially in viewof the yary condltlpns ing therefromis in a condition' to be passed 25 arising uring the operatlon oft emachme, directly m web forming element-- a I such as the variation in uallty nd 7 I have also aimed to provide a combined sistency of the- 9 and dlfierenws m screen and head box of'improved-efliciency'. speed of the machine whenoperated forthe Ajfurther object is thepmvision 6f pr duction of "H0115 yp m" H ittireof; the character described wherein the i Y 0 tofore this has been accompl shed bypassmechanism and chambermaybe priisbdind 'ing the Stock Into a head 0 '1" deslgned lowered with respectfto the web forming ele- "a W t 5 mam 1mm bf the'machinel 1 eit onto the web formingelement in the de- Anotheltnobjectg is th provision f i sired condit on. VHowever, the head bOX lS proved means for d i p l ti fth I ly to p e y t stock whereby dead'areasand quiescent zones the velocity and directionof flow of the stock are eliminated and improv d screening m and consequently the flow characteristics of i i bt i d p I the stock are not'completely satisfactory'in A further object is the provision jof as. 40 p v the elaborate 11mins P structure having screeningmeans and flow ,thermore, during the movement ofthe sto k evening a means arranged in a single chamthrough the pipes connecting the screens nd ber for screening therstock and substantially head bOX- and thlOllgllthO head b0! itself, si nultaneously evening thg vflow t erebf, the condition the s kfi i h may have I have alsofaimedto provide a evioehav 5 en perfect uponleaving the screensbe-' ing means for evening outtheflow ofstoclq n comes impaired through accumulation of the simultaneously with its passage through the bers by settling in dead ,space's, etc. thus screen and 'for conducting it directly onto producing bunchy orlumpystock. Likewise, the'web forming element." I f while the flow characteristics of the stock on 1 Other objects and. attendant advantages? l0 leaving the screens approaches those rewill become apparentvfrom the following de- 109 19 which pass and'22 of the ends and the standards, re-

s ectively, as best shown in Figure 1. Suit- P scription and the accompanying drawings in which- Figure 1 is an end view of a machine embodying my invention;

Fig. 2 is a top view; Fig.3 is a section substantially on the line 3-3 of Fig. 2;

Fig. 4 is a section on the line 4-4 of Figure1,and

Fig. 5 is a section on the line 5--5 of Fig. 4. In a general way,

liver stock directly to the web forming element of a paper making'machine' through conventional slices. element is supported within the chamber on eccentrics and guides which impart, upon rotation thereof, an oscillatory motion to the pulsating element. A screeningicylinder surrounds and is concentric with the ulsating element and means are provided or rotating the cylinder. Means are provided for feeding stock to the interior of the pulsatingelement through-which it flows into the space adjacent .to the screening .cylinder where it isgivenby'the screening cylinder so that it is suitably prepared for direct application to the web forming element. For every speed of the aper machine there is a certain desired head back of the slices. Means are provided whereby, without changing this head, the chamber may be adjusted vertically to bring about the desired immersion of the pulsating element and the screening cylinder.

Referring now more particularly to Figures 1,3 and 4, the chamber consists of an arcuate bottom portion 7 secured at opposite ends to side walls 8 and 9. Troughs 11 and 12 are secured to the end portions 8 and :9 through flanges 13 and bolts 14, the troughs having an open side communicating wit the interior of the chamber. The chamber is supported upon spaced standards 15, 16,

17 and 18, the end portions 8 and 9being secured to these standards by means of bolts through flanged portions 21 a le slots 23 are provided in the flanges 21 and 22 to permit the chamber to be secure in any of a plurality of elevations. A' fixed portion 24 of the chamber ispositioned along an open side of the vertically adjustable portion just described and consists of an apron board 25 and vertical pond sides 26 and 27. Slices 28 and 29 of conventional design are supported between the pond sides 26 and 27 and serve to regulate the How of stock to the webforming element 31 supported on the breast roll 32. An apron 33 also of conventional design is secured to the apron board 25 of the fixed rartion 24. Deckle pulleys 34 and 35 may supported upon the sides 26 and 27 if desired to support the the device consists of a chamber having an open side adapted to de- 1 An arcuate pulsating the channel iron members 37 desired flow characteristics {1 flexibly connected between the end portions 8 and 9 and are secured thereto by brackets such asshown at 41. The channel iron members serve to reenforce the structure and to provide for supporting and for raising and lowering the same. The member 38 further serves to suport the arcuate bottom 7 of the chamber as best shown in Fig. 3.

Means are provided for raising and lowering the movable portion of; the chamber with respect to the fixed portion24 and the standard. This may advantageously consists of gear boxes 42 and 43 position'e neath the chamber and driven by a motor 44 or other prime mover. Screws 45 and 46 are positioned in the gear boxes 42 and 43 and are provided at their upper" ends with feet 47-and 48 bearing against the lower side of and 39. Upon operation of the motor 44 the gears of the ear boxes 42 and 43 by raising or lowering the movable portion of the chamber with respect to the fixed'portion 24. The bolts 19 must, of course, be

will cause the'screws' 45 and 46 to be projected orretra'cted, theredbe-,

loosened to permit this operation and may then be again tightened to provide a liquid tight chamber.

In order to provide "a'continuous bottom for the chamber connecting the bottom 7 of the movable portion with'the apron board 25 of the fixed portion a flexible, extensible connection is provided therebetweenr This consists of parallelly spaced plates 49 and 51 to the bottom 7 by means of a piece of rubber 52 or the groove tion. The

d between the plates 49 and 51 depending upon the movement of the movable portion of the chamber to extend or contract the connection between these portions. The flexible portions 52 and 54 permit of the necessary change in angularity of the plates 49, 51 and 53- incident to the movement of the movable portion ofthe chamber. Two rows of spaced cams and 58 threaded into the channel iron 39 and into bosses 59 on the These cams and boltsserve to support the connection so that the full-weight of the plates 49, 51, and 53 need not be supported by other suitable flexi-H h ble'. material, the plates 49 and 51 forming bottom ,7, respectively.

55 and 56 are cast on theplate51 and' rest on the ends of spaced rows'of bolts 57 tion of the sleeves82. This pulsating the flexible members 52, and 54 the cams movingover thebolts as the chamber-is raised or, lowered.

St'ockis supplied to, the interior of the chamber from a distributor pipe 61 byany of numerous and well known flexible connec-' tions. .In this particular. instance, I have 64 is threaded onto then ipple. 62 and serves to receive a short piece of pipe 65, the opposite end of which is received in a second el-.

bow 66. A second short piece of pipe 67 extends between the elbow 66 and an. elbow 68 which in turn is connected to a T 69 on the pipef61 by means of a pipe 71- It will be seen' th'at if these pipes and elbows are not screwed together too tightly they will permit sufiicient movement in the joints, for the raising and lowering of the movable portion of the chamber. .1 I

A shaft designated generally by the numeral 72 is supported near its ends in bearings 73 and 74 which are in turn supported upon cross-arms 75 and 76 sup orted upon and secured to. the'vertically ad ustable .portion of the chamber by means of bolts 77.

One end of the shaft 72 extends outward over the trough 11 and is supported in .a bearing 78 on the trough, the extreme end of the shaft carrying a sprocket 79 over which is trained a chain 81 which serves to drive the shaft. Sleeves such as shown atJ82 are positioned on an eccentrical portionof the shaft 72 adjacent to the bear1ngs-73.

and 74. the sleeves being fixedly secured thereto by means of set screws 83. Te sleeve 82 is of variable wall thickness suchthat it may be adjusted. to oifsetthe eccentricity of the shaft portion 80 orto add to this eccentricity as desired. Bearings 84 are po sitioned on the sleeves 82 and are fixedly .se-

cured to the ends of a cylinder 85 by means of cap screwsv 86. The cylinder. 85 carries a plurality of webs 87, 88 and 89 shown-best in. Fig. 3, which extend radially from the lower side of the cylinder 85, each of the webs consisting of longitudinally spaced arms such as shown at 91 and 92 in Fig. 4. 1

An arcuate pulsating element 93 having a plurality of small openings 94 is fixedly secured to the webs 87, 88 and 89 by means of cap screws 95, whereby the pulsatin element mav be eccentrically supported wit respect to the cylinder. 85 depending upon the polsie ment extends the full length of the cy inder 85 andis arcuatel-y curved transverselyof its length through a portion of a circle, as best shown in Fig. 3,. To prevent rotation of the pulsating element an upwardly extendlng arm 96 is fixed .to the cylinder85 and is.

provided at its upper end with a pin 97'rotatabl secured in a block- 98 which is in turn slidabl ing of substantially greater lengththan y positioned in arcuate arms 99 and 101secured to the chamber by means of screws 102 at each end thereof. ThlSCOIlstruction permits the arm 96 to move verticall with respecttothe arms 99 and 101 and to. ave rotative movement with respect thereto, thus providing a guide for control ling the movement of the pulsating .element A flow evening-and screening cylinder des-. ignated-generally by the numeral .103 is con.- centrically positioned with respect to the pulsating element 93 and rests between said element and the bottom 7 of the movable portion of the chamber. This consists ofasurface covering 104 and a framehaving s acedv longitudinal bars 105, spaced circumfi tial bars 106 and channeled vendmembers a designated generally by. the numeral 107.

p The covering 104 is (secured to the frame by.

means of screws 110 and strips 108'secured tothelongitudinal frame members '105;through cap screws 109. The covering 104 is-provided with a plurality of longitudinally and :cir-.. cumferentially'spaced slots 111, the slots be,-

width for-the purpose of passing the stock erenthrough the flow evening and screening cylw I inder. A.more definite idea of the shape. characteristics of these slots maybe had bya comparison ofFigs. 3 and 4." The diameter of ,the cylinder is such that it will project a";

substantial distance'above the." open upper side of the chamber when in operative posi-; tion with respect to the bottom 7 thereof, as shown in Fig. 3, so that driving. and cleaning mechanisms presently to be more fully 1 described, may be positioned above the chamber.- It will beseen that upon rotation of .thershaft 72 the sleeve 82 will .;be rotated causing the pulsating element .93 .to be oscillated in a manner to cause the, stock between the pulsating element and the screening cyl-- inder to be forced through the screening openings 111 to the outsideof the cylinder. Furthermore, the manner of oscillation is such as to utilize the entire area of the screening cylinderwhich maybe at the time submerged in the pulp and that no quiescent zones are produced along the surfacethereof.

The screening-cylinder issupported for r0- tationin. the trough members 11 and 12 in a manner best shown in Fig. 4. This means consists of right angled grooves positioned on the innersurface of the trough membersll and 12 adapted to receive the members107.

along the circumferentialface of the groove .opposite the bearing surface 115 of the members 107,. the width of the bearing An arcuate rubber bearing member-112 is-po-- 1 rubber bearing member 114 is positioned member 114 being-such as to leave a space.

116 between the edge thereof and the face of the bearing member 112. The end member 107 is provided with a channel 117 extending therein circumferentielly of the screening cylinder and with a pluralitygbfcireimiferentially spaced openings 118-and 119 extending from the channel 117 to the end 113 thereof and to the circumferential bearing face 115 thereof. The channel 117 and the openings 118 and 119 serve to conduct lubricating liquid to the'interfaces between the end member 107 and the rubber bearing members 112 and 114. This lubricating fluid usually consists of water and meansare provided for maintaining a substantially constant level of water in the channel'117, this means being shown in Fig. 5, and consisting of a supply pipe 121 supported on each of the arms 99 and 16-1, presently to be more fully described. The

- nozzle 122 is positioned to deliver a stream of water a ainst the outside of the end member 107 m the vertical plane of the openings 119 so that as the cylinder'revolves, water Wlll be sprayed throu h the openings into the channel 117. In t is wa water is constantly supplied to the channe 117 and is maintalned at substantially the level of the upper edge of the trough members 11 and 12. An

opening 123 in the trough members 11 and 12 connects the space 116 with the atmosphere and permitsthe escape of water draining,

from the bearing surfaces.

Means are provided for keeping the inside of the screening cylinder 103 free from pulp and slimeand for conducting away'the solids which fail to pass through the openings therein. This consists of a spray pipe 124 which may advantageously be supported in cradles 125 on the arms 99 and 101 as shown in Fig. 4. A suitable connection 126 is provided for supplying water to the pipe 124.

The pipe 124 is arranged to provide a spray of water against the outside of the cylinder 103, the water passing through the openmgs 111 thereof. A tray or pan 127 is fixedly supported on the top side of the cylinder in a position to receive the water from the spray and the solid particles removed from the screening cylinder by action of the spray.

.Pipes 128 serve to drain the tray 127. In order to confine the'splash caused by the impingement of'fthe spray water against the outside of the screening cylinder 103, angle iron members 129 and 13 1, carrying flexible members 132 and 133 in close proximity to the outer surface of the cylinder, are secured at opposite ends to the arms .99 and 101., extending therebetween and being afiixed thereto by means of bolts 134.

The shaft 72 and the screening cylinder 103 are driven from a motor 135 or other prime mover su po'rtedupon channel iron members 136 which rest upon bracket members 137 secured to the side of the movable portion of the chamber. One'end of the motor shaft 138 is provided with a sprocket 139 for receiving the chain 81 through which the shaft 72 is driven. The opposite end of the.

motor shaft 138 is connected to a ar box 141 throu h which a shaft 142 is driven, the free end 0 the shaft having bearing support in a bearing 143. A chain 144 isdrlven from the shaft 142 by means of a sprocket and is 1 trained over a sprocket on a gear shaft 145 rotatably supported in the arm 101. A gear 146 on the shaft 145 meshes with a large ring gear 147 positioned on the periphery of the flow evening and screening cylinder 103 cylinder, the oscillation J bringing about ispersions of the fibers in the stock and uniform distribution thereof. It will be seen that a further action of the pulsating element is to tend to bring about a movement of the stock in the direction of movement of the web forming element. As soon as the stock asses through the pulsating element it is rought in contact almost immediately with the rotating screening cyl I inder 103 and here again it must pass through rotation of the cylin er 103 not only assists in the preparation of the stock but imparts" thereto a direction of flow substantially cylinder 103 it is conducted almost immediately through the slices 28 and 29 onto the web forming element, so that no time nor stock is directely applied to the web forming element.

Attention is called to the fact that the.

oscillation or shakin effect of the pulsating element is radial an that the action is uniform throughout the surface of the screening cylinder in contact with the stock whereby all of the screening area is utilized to its greatest efliciency. This results in substanit leaves no dead s ots or quiescent zones along the surface 0 the screening cylinder which may oifer an opporunity for segre ation of the fibers. Furthermore, this action also materially assists in bringing about the reversal of the direction of flow and in even} tially greater uniformity. of action, in that 7 ing out the flow characteristics of the stock,

thereby simplifying and supplementing the normal action of the flow evemng and screening cylinder.

Mechanism has been shown and described for 'altering the elevation of the vertically movable portion of "the chamber'and of the pulsating element and" screening cylinder. As a result of this constructionit is possible to regulatethe preparation of the stock independentlyof the head. In otherwords, in the. old typeof mechanism it was necessary to' set theheadfor the maximum capacity without regard to the character, consistency,

or'amount of th'efs'tock. With the present construction the operator 'may regulate the headto correspond with thespeed of the machine and independently regulate the pulsating element and screening-cylinder to give the best preparation ofthe stock by varying the height of the movable portion of the ing the amount of chamber, thereby var screening'cylinder use --The operator'may alsovary the speed of the oscillation and vary the length of the oscillation stroke. Thus, this construction permits of materially greater flexibility in operation whereby the stock is placed on the web'forming elementin substantially better condition than has hereto-- fore been possible; 1

-It' will furthermore be seen' that through myimproved construction I have completely eliminated the customary head box, together with the objectionable featuresthereof and, instead, passthe stock from the screening a cylinder directly onto the web formingielement, leaving no opportunity for the fibers to felt or mat while the flow of the stock is being evened out. The stock is continuously in movement thereby largely eliminating the possibility of slimecollectingu However, should a small amount of slimeappear itis immediately-removed by the rotating screen cylinder. i Y i j Attention is directed to'the'fac't that the presentdevice may 'berused with a battery ofscreen's to receive the stock therefromand deliver it to the web forming element. v

While Ihave thus described and illustrated a specific embodiment .of my invention I fam aware thatnumerous alterations and changesmaybe made therein without materially departing from the spirit of the invention and the scope of theappended claims in which I claim: i i v 1. In a paper making machine, the eombination -with a-web forming element, of a,

chamber positioned to supply stock directly to said web'forming element, and means in said chamber for screening and evening the flow of said stock. V M a 2. In a paper making machine, the combi-v nation with a web forming element, of a chamber positioned to supply stock directly to said web forming element, a screen in said chamber for screening said stock and imparting desired flow characteristics to said stock for application to the web forming element,and means for imparting a pulsating said chamber "for I ulsat'ing element positioned: in said: chamthe screening cylinder,

movement to the stock to force it through 3.".In a paper makingfimachine, the combination with a web forming element, of screening mechanism for said stock, means in said screeninggmechanism for imparting ,desired flow characteristics to-the stock, and means for conducting the emerging stock directly onto said web formingfelementf y '1 118- paper making machine, the combination with asurrounding said for, shakingnsa'id element and thence" web' formingelement, of a chamber", substantially concentric pulsatin and screenin' elements" positioned in' sai chamber, an

the stock through l ing the cylinder to even the flow :ofthestock passing tosaid webform'ing element.-- r v In a paper making machine-the combination-withaaweb forming element, of a chamber for receiving the pulsatingelement positioned in saidchamber,'a screening cylinder surrounding said pulsating element, means for shakingsaid stock, an arcuate pulsating element to pass the stoc k-through means for a rotating the cylinder to even the ing to said web forming'element, andmeans for adjusting the height regulate the submergence of the elements therein. 1 a 7; In apaper making machine, the combination with. a' .web.

forming element,- of a chamber, sllces arranged to. control theflow of stock from said chamber-to said web forming element, screeningand fiowdevening-eleflow of stock passof said chamber to v ments in said; chamber, and means for raising and lowering'said chamber to regulate the amount of submergence of said elements inthestock. 18; "In a paper making machine, thecombichamber, slices arranged to controltheflow of stock from said chamber to said web forming element,pulsating and'screening elements in said chamber, means forshaking said pulsating element, means forirotating said-screening element, and meansforralsmg a and lowering said chamber the stock.

having screening and flow evening elements, a chamber having a slice gate portion of fixed elevation, a portion of variable elevation, and an extensible, flcxible connection between said to regulatev'the amount of submergence .ofsaidelementsin Q 9. In a device of the character described" 115 nation with a web forming element, of a -center, means forcenter of saidcylinder from opposite ends I 14'. In a device of the guide,

forate cylinder surrounding said pulsating portions forming a substantial liquid-tight rtions forming a substantially liquid-tight 1nnctiontherebet'ween at all, elevations of said last mentioned portion, and means for said" connection in the various tion. V I

11'. In adevice of the character described having screening and, flow evening elements,-

achamber having/a slice portion of fixed elevation, a portion of variable elevation, and

a flexible, extensible connection therebetween comprising a-pair' of parallelly sp'acedplates flexibly connected to one of said portions, forming'the groove of a tongue and'groove connection, and a plate flexibly connected to the other of said portions, forming the tongue of said connection and being adapted to move between said parallel plates to lengthen or shorten said connection. i

12. In aidevice of the character described, the combination of a chamber, an arcuate ulsating element supported in said chamber or oscillatory motion, a screening cylinder surrounding said pulsating. element supported to rotate on a fixed center, means for supplying paper stock to the center of said cylinder,and meansfor conducting the stock from the outside of said cylinder directly to a web forming element.

f 13. In a device of the the combination of a chamber, a pulsating element supported in vsaid chamber, crank means for supporting said pulsating element character described,

and imparting oscillatory motion thereto, a

erforate cylinder surrounding said pulsat-v ing element supported to rotate on a fixed supplying stock to the thereof, and means for conducting stock from the outside of said cylinder. 7

character described, the combination of'a chamber,'apulsating element supported in said chamber, means for supporting said pulsating element for oscillatory motion including a crank' and a means for rotating said crank, a perelement supported to rotate on a' fixed center,

meansfor rotating said cylinder including a I gear onthe periphery thereof .and a driving gear. to engage the same, means forsupplying stock to the cente-rjof said'cylinder, and means for conducting stock from the outside of said cylindeia,

15.jIn'a device of the character described,

a rotating cylinder having bearingsurface on the periphery thereof'at each end, rubber bearing surfaces held thereagainst in supporting relation, and means for conducting a liquid to the'bearing interface at frequent intervals along said bearing surface.

316. In a device of thecharacter described, a chamber havingendwalls, arcuate rubber bearing faces in said endwalls,- a perforate cylinder having peripheral bearing surfaces shaped to support said cylinder on said bears ing faces for rotation, and. means for conducting a lubricating liquid through said bearing surfaces saidsurfaces, v;

' .17. In a device of the character described, a chamber having end walls, arcuate rubber bearing faces in said end walls, a perforate cylinder having circumferentialchannels at each end, peripheral bearing surfaces shaped to support said cylinder for rotation on said bearing faces and openings from said channel through said bearing surfaces to conduct a lubricating liquid thereto, and means for supplying a lubricating liquidto said channels, -v a a 18. In a device of ,the character described,

a chamber having end walls,arcuate rubber at frequent intervals along a plying a lubricating liquid tosaid channels, v

and means for conducting away the liquid passin through the bearings;

19.- n a paper making machine of the character described, a rotating screening cylinder, a chamber surrounding said cylinder, a; pulsating element of substantially the same curvatures said screening cylinder located in concentrically spaced relation thereto having a plurality of openings, eccen:

tric means for supporting said pulsating ele-. ment arranged to, be rotated to impart a rotating pulsation to. the stock-ibetween said cylinder andisaid pulsating element, and. means for conducting incoming stock to the interior of said pulsating element.

' EARL E. "BERRY, 

